678 



THE ' Permian' rocks of hamstead. [Dec. 1912. 



(6) Markings of Inorganic Origin. 



Markings of undoubtedly inorganic origin, such as ripple-marks, 

 rain-prints, and desiccation-cracks, are all very common, distinct, 

 and abundant in the Hamstead rocks. 



Of more doubtful origin are certain interesting circular marks, 

 flame-shaped markings, and series of parallel lines. Some of the 

 last-named mimic Equisetum. 



(7) Table 1, showing the Local Range of the Fossils of the 

 Hainstead-Quarry Series. 



Table I embodies the names and vertical distribution of the 

 various fossil forms which I have discovered in the Hamstead 

 Quarry Series. 



Table I. 



Gravel-Pit New-Quany j Rock- 

 Sandstone & Sandstone & Farm 



Conglom. i Marl Sub- , Couglo- 

 1 Sub-group group merate 



=BiofKing. =3.2. =Ci. 



Old- 

 Quarry 

 Sand- 

 stone 



Manor-House 

 Breccia & 

 Sandstone 

 Sub-group 



Hi = 



^la- 

 mb-. 



H2- 



Plants. 



Walchia piniformis 



TTalchia imbricata '■ 



Artisia j 



Animalia. I 



Ichnnim splicerodactylum . 



Ichniotherium cottce 



Iclinium sph(erodactylum 

 (minimum) or Ichnio- 

 therium cottce {m inus) ... 

 Ichniu7n pachydactyluiu ... 

 Ichnium pachydactylum 



(minus) 



Ich n ium pa chyda c ty lam 

 (ungiilatam) or Saurich- 



nites leisnerianus ' 



Ichnium hrachydactylum . 

 Ichnium dolichodactyhim . 

 Ichnium gampsodactylum 

 Saurichnites lacertoides ... 

 Ichnium gampsodactylum] 



(minus) i 



Ichnium acrodactylum (?) 



V. Geological and Geographical Distribution of the Fossils 



OF THE HaMSTEAD-QuARET SeRIES. 



(1) General Distribution. 



Table II (p. (579) summarizes the geological and geographical 

 distribution of the foregoing (or nearly allied forms) in other parts 

 of Britain and in Germany, France, and America. 



